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Callen-Lenz is a UK leading SME providing cutting edge technology and services in the unmanned aerial vehicle sector, supporting the public and private sector internationally. The design, development, and manufacturing of novel UAV platforms is all performed in-house, providing market leading capabilities to suit customer mission requirements.

In addition to producing airframes, Callen-Lenz specialises in producing in-house mission management and software, SkyCircuits 3 (SC3). Integrated into platforms, aircraft can operate with minimal pilot workload to maximise intelligence, surveillance and reconnaissance (ISR) and payload capabilities.

This is all underpinned by expert knowledge of the aviation industry, from design engineers to test pilots and flight test engineers, Callen-Lenz can provide up-to-date advice and support to clients that seek experienced independent input from qualified staff.


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  • Callen-Lenz offers an array of technical services, bringing novel concepts to life through the process of ground-up development and technical consultancy, as well as testing and developing existing id ...
  • Callen-Lenz provide independent advice on the establishment and management of complex air operations.  
  • SC3

    SkyCircuits is a wholly owned subsidiary of Callen-Lenz, delivering high integrity, flexible autopilots and avionics for both manned and unmanned systems all underpinned by expert, in-house software d ...
  • Koios is an operationally proven, medium-sized S2 Vertical Take-off and Landing (VTOL) platform offering strategic Intelligence, Surveillance and Reconnaissance (ISR) capabilities with a tactical foot ...
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